A former Youngstown wastewater-company executive has pleaded guilty to federal Clean Water Act violations in the dumping of thousands of gallons of fracking wastewater into that city's storm sewer system.

An employee of a Youngstown company accused of dumping tens of thousands of gallons of fracking waste into a tributary of the Mahoning River has changed his plea to guilty to charges of violating the Clean Water Act.

The Ohio Department of Natural Resources has permanently revoked the operating permits of two companies being investigated for the illegal dumping of up to 20-thousand gallons of fracking wastewater down a Youngstown municipal storm drain.